<template>
  <el-container class="home-container">
    <!--页面头部区域-->
    <el-header>
      <div>
        <img src="../assets/logo.png" alt="" class="headerimg">
        <span>电商后台管理系统</span>
      </div>
      <el-button @click="loginOut" type="info">退出</el-button>
    </el-header>
    <!--页面主题区域-->
    <el-container>
      <!--侧边栏-->
      <el-aside :width="isCollapse ? '64px': '200px' ">
        <div class="toggle-button" @click="toggleChangeClick">|||</div>
        <!--侧边栏菜单区域-->
        <el-menu
                background-color="#333744"
                text-color="#fff"
                active-text-color="#409eff"
                unique-opened :collapse="isCollapse" :collapse-transition="false" router :default-active = "activePath"
                >
                <!--collapse是否折叠-->
                <!--:unique-opened绑定后true生效，处理只能单个闭合-->
          <el-submenu :index="item.id +' '" v-for="item in menulist" :key="item.id">
            <!--一级菜单的模版区域-->
            <template slot="title">
              <i :class="iconObj[item.id]"></i>
              <span>{{item.authName}}</span>
            </template>
            <!--二级菜单-->
            <el-menu-item :index="'/'+itemgroup.path" v-for="itemgroup in item.children" :key="itemgroup.id" @click="saveNavState('/'+itemgroup.path)">
              <i class="el-icon-menu"></i>
              <span>{{itemgroup.authName}}</span>
            </el-menu-item>
          </el-submenu>
        </el-menu>

      </el-aside>
      <!--右侧内容主题-->
      <el-main>
        <!--路由的占位符-->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
// @ is an alias to /src
export default {
  data(){
    return {
      //左侧菜单数据
      menulist:[],
      iconObj:{
        '125':'iconfont icon-user',
        '103':'iconfont icon-tijikongjian',
        '101':'iconfont icon-shangpin',
        '102':'iconfont icon-danju',
        '145':'iconfont icon-baobiao'
      },
       isCollapse:false,
      //被点击的链接地址
      activePath:''
    }
  },
  //在页面加载时候请求菜单数据
  created(){
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    loginOut() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    //获取所有菜单
    async getMenuList(){
       const {data:res} = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
      // console.log(res)
    },
    //点击按钮切换菜单的折叠展开
    toggleChangeClick(){
      this.isCollapse=!this.isCollapse;
    },
  //  保存链接的激活状态
    saveNavState(activePath){
      window.sessionStorage.setItem('activePath',activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
    .home-container {
      height: 100%;
    }
    .el-header {
      /*padding-left: 0;*/
      background-color: #373d41;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: #cccccc;
      font-size: 20px;

      >div {
        display: flex;
        align-items: center;

        span {
          margin-left: 15px;
        }

        .headerimg {
          padding: 3px;
          width: 34px;
          height: 34px;
          border-radius: 50%;
          border: 1px solid #373d41;
          box-shadow: 0 0 0 .5px #cccccc;
          /*box-sizing: border-box;*/
        }
      }

    }

    .el-aside {
      background-color: #333744;
      /*处理边框线对不起的效果*/
      .el-menu{
        border-right: none;
      }
    }

    .el-main {
      background-color: #eaedf1;
    }

    .iconfont {
      margin-right: 10px;
    }
  
    .toggle-button {
      background-color: #4a5064;
      font-size: 10px;
      line-height: 24px;
      text-align: center;
      color: #fff;
      letter-spacing: 0.2em;
      cursor:pointer;
    }

</style>
